All that is known so far about the future Linux Mint 17.2 release at this point in time can be found here:Linux Mint 17.2 codenamed ‘Rafaela’So far almost none of your questions can be answered. But you may like to have an eye on new blog articles about "Linux Mint 17.2 codenamed ‘Rafaela’" in order to be among the first to learn any new details.

Cheers,Karl

Old bugs good, new bugs bad! Updates are evil: might fix old bugs and introduce no new ones.